Tool for slitting and cutting off well-casings.



Patented; lune 26, |900.

AT. L Aw.. TUULFOR SLITTING ANDl CUTTING OFF WELL CASLIIANGS.

(No Model.)

2 Sheets-Sheet l.

H lll 4 Y I'IIIIIIIII III-I i |||I||Il IIIIIIIIII.

No. 652,367. Patnted .lune 26, |9001.

T. LAw. TOOL FR SLITTING AND CUTTING UFF WELL CASINGS.

(Application led Nov. 17, 1899.)

UNITED STATES PATENT Ormes.

THOMAS LAIV, OF SAN JACINTO, CALIFORNIA.

TOOL FOR SLITTING AND CUTTING OFF WELLMCASING'S.

SPECIFICATION forming part of Letters Patent No. 652,367, dated J' une 26, 1900. mamon med November 17,1899. serial No. 737.349. (No modem raising a drill when it shall become discon-A nected and have fallen to the bottom of th Well.

The object of the invention is to provide a means for positively operating the different special tools employed for these different'purposes and to produce such implements as will be simple in their construction and efficient in their operation.

In the drawings forming a portion of this specification, and in whichsimilar numerals of reference designate like and corresponding parts in the several views,Figure 1 is a perspective view showing the pipe-cutter, the cuttingdisks being disposed for splitting the pipe or casing. Fig. 2 is a central vertical section of the implement shown in Fig. 1, the jar-rod and a portion of thewedge being shown in elevation. Fig. 3 is an `elevation showing the inner face of one of the jaws with the dove tailed slot therein. Fig. 4 is a detail perspective view, partially broken away, showing the sleeve which is connected to the upper end of the wedge and in which the jar-rod acts. Fig. 5 is a perspective view showing a drift constructed in accordance with the present invention. Fig. 6 is a perspective view showing a drill-grab embodying the invention.

Referring now to the drawings, and more particularly to Figs. 1, 2, 3, and 4, 10 represents the head-block of the pipe-cutter, and which block has a transverse slot 11 in its underside, resulting in the formation of two arms 12 and 13. In the slot 11 arepivotally mounted two jaws 14 and 15, which are substantially triangular in elevation and lie normally with their inner faces parallel.

In the outer face of the jaw 14 is' formed a curvilinear recess 16, opening into which are screw-threaded perforations 60,0ne of which is disposed transversely of the jaw and the other longitudinally thereof and at right angles to the iirst perforation. These perforations are adapted to interchangeably receivea pin 17, having an antifriction-roller 18 rotatably mounted thereon, and which roller may be thus disposed to rotate in a. plane longitudinally of the jaw or in a plane transversely thereof. `In the outer face of the jaw 15 is a.

grooves`23, with which are engaged correspondingly-formed wear-blocks 24, which are adapted to receive direct engagement of a reciprocatory wedge 25, which is adapted to be forced downwardly between the wear-blocks 24 to spreadthe jaws and force the roller 18 and disk 21 against the inner surface of the well-casing.

In order to reciprocate the wedge 25, the stem 26 thereof is passed upwardly through a perforation 27 in the block 10, and which perforation is enlarged in its upper portion and is screw-threaded for engagement of the threads upon the lower end of a tube 28, which extends upwardly and is formed in sections having connections 29, whereby this tube may be continued and formed sufciently long to project above the upper end of the well.

The stern 26 of the wedge 25 extends upwardly and into the lower portion of the tube 28, and upon its upper end and inclosing the up er extremity is disposed a sleeve 30, havin,D longitudinal slots 31 in its opposite faces. The jar-rod 32, which may be formed in sections, as shown in Fig. 2, hasits lower end slidably disposed within the sleeve 30 and has radially-extending pins 33, which lie in the slots 31 and are adapted for recipr0ca` tion therein. The jar-rod 32 is sufficiently long to extend above the tube 28 and is IOO If it be desired to split a portion of the casv ing of the Well, the implement is let down through the top of the casing to the proper distance, after which the jar-rod is raised and then dropped a snflicient number of times tol` force the Wedge 25 downwardly and force the jaw 15 outwardly to an extent sufficient to sink the cutting-disk 21 into the inner surface of the casing to the proper degree. means of the tube 28 the implement is then reciprocated, causing the disk 21 to roll up 1 and down the casing and to cut into the material thereof after the manner of the common form of pipe-cutting tool. After the iirst yout has been made the jar-rod is again f operated to further sink the cutting-disk 21,

and this operation will be continued until the disk has cut entirely through the casing.

It will be noted that the casing 20 is rectangular in form, and this construction permits the lcasing to be removed and to be reinserted with the cutting-disk 21 in a horizontal plane instead of in a vertical plane, as shown. With this horizontal arrangement of `disk the implementis adapted for cutting off the casing, and it will be seen that if the disk be arranged horizontally and the implel ment inserted in the well the operation ofv the jar-rod will cause the cutting-disk to sink into the inner surface of the casing, and by then rotating the pipe 28 the jaws 14 and 15 i will be correspondingly moved and the cutting-disk will be'caused to travel completely around the inner surface of the casing. By

repeating the voperation of the j ar-rod the disk 21 may be further moved to cut a deeper groove, 'and the pipe will be nally cut olf,

the roller 18 being at this time horizontal.

known as a drift, and which implement is employed in straightening lout the well-casing'and in removing dents. This implement comprises 'a head 40, which is bifurcated to form larms 41 and 42, between which arms are pivoted the expan'sible jaws 43 and 44. These jaws are equipped upon their inner faces with wear-blocks similar 'to blocks 24, above described, and are adapted to be forced out-- wardly upon their pivots through the lmedium of a wedge 45, which is operated in the same manner as above described.

attached to the tube.

Athird tool is shown in Fig. 6 of the drawi ings :and is known as a drill-grab, and con- 5 sists of ahead 50, having arms 51 and 52, between which are pivoted links '53 and 54,

which are 'provided upon their-inner faces with wear-'blocks similar to blocks '24, which are adapted for Vengagement bythe wedge 25. Pivotally connected with the links 53 and 54 are additional links 55 and 56, these links 55 and 56 being mutually connected by means of a strap 57, to which they are pivoted. The links 55 and 56 extend beyond the strap 57 and upon their lower ends are provided with barbs 58 and 59. In the employment of this implement or tool the head, with the links attached, is substituted for the head 10 upon the tube 28, and the tool is then entered through the top of the well-casing when it is desired to remove the drill or other obstruction which may have fallen into the well. When the tool has reached the proper point,

the Wedge 25 is operated to spread the toggle-links outwardly and to move the barbs 58 and 59 inwardly and engage them with the article to be lifted from the well. By reciprocation of the jar-rod the desired grip of the barbs 58 and 59 canv be secured, after which by drawing upwardly upon the pipe 28 t-he tool is removed and draws the obstruction with it. i

From the foregoing description it will be seen that there has been provided a plurality of special tools adapted for interchangeable connection with a common tube provided with a wedge and an operating jar-rod, and it will of course be understood that in practice any ,number of each species of tool may be employed for operation under different conditions and in casings of various diameters.

Also it will be understood that the specific,

yconstruction shown may be altered and 'that yany desired materials and proportions may be employed without departing from the spirit yof the invention. v

As shown in Fig. 2 of the drawings, the wear-blocks are thicker at their lower yends than at the upper ends, and thus as the wedge 25 is fixed downwardly the jaws will have a greater separation than if the blocks had par- In Fig. 5 of the drawings is shown what is allel faces, and thus the tool may be employed in connection with casings of different diameters.

What is claimed isi- 1. Adevice of the class described, comprising a head having jaws pivoted therein, a tube connected with the head, a wedge vslidably mounted in the head, said wedge lying at -one yend between the jaws, and atthe other end within the tube, a sleeve carried by the wedge, `and a jar-rod connected with the sleeve and adapted for reciprocation therein to force the wedge against the jaws.

2. A device of the class described, comprising a head, jaws pivotally mounted in the head, a wedge between the jaws and adapted 'for engagement therewith to force them youtwardly, and a jarrod connected with 'the wedge a-nd adapted for reciprocation to force the wedge against the jaws.

'3. A device of the lclass described, comprisi ing a head, jaws pivotally mounted in the head, a tube connected with the head, a wedge disposed between the jaws andextending into IOO IIO

the tube, and a jar-rod adapted to move the wedge against the jaws.

4. A device of the class described, comprising a head, jaws pivotally mounted in the head, wear-blocks removably connected with the inner faces of the jaws, a tube connected withy the head, a wedge disposed between the jaws and extending into the tube, a sleeve upon the upper end of the wedge, slots in the sleeve, and a jar-rod disposed in the sleeve and having pins lying in the slots and adapted for reciprocation'therein as the rod is raised and lowered.

5. A device of the class described, comprising a head having jaws pivotally mounted therein, a tube removably connected with the head, a wedge disposed between the jaws and extending into the tube, and a jar-rod connectedwith the wedge and adapted to force it against the jaws.

6. A device of the class described, compris- V ing a head, jaws pivotally mounted in the head, a bearing carried by one of the jaws, a cutter carried by the other jaw, a tube connected with the head, a wedge disposed between the jaws and extending into the tube, a slotted sleeve upon the wedge, and a jar-rod having pins disposed in the slots and adapted for reciprocation therein as the rod is moved to force the wedge against the jaws.

7. The combination with a tube anda wedge having one end disposed within the tube, of

a j ar-rod connected with the wedge and adapted for reciprocation with respect thereto, said tube being adapted for interchangeable connection with a plurality of heads each having jaws adapted for engagement by the wedge to force them outwardly.

8. The combination with a tube, of a wedge having one end disposed within the' tube, a sleeve connected with the wedge and having slots, a jar-rod disposed in the sleeve and having pins entered in the slots and adapted for reciprocation therein to permit the rod being moved with respect to the wedge, said tube being adapted for interchangeable connection with a plurality of heads, each of said heads having jaws pivoted thereto and adapted to receive the wedge between them to force them outwardly.

' 9. A pipe-cutter comprising a movable portion adapted to be forced in the direction of the surface to be cut, and a cutting-disk rotatably mounted in the movable portion and adapted for adjustment to operatively engage the surface to be cut when the movable portion is moved in different directions.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

THOS. LAW.

Witnesses:

R. M. MOKIM, E. B. KNAPP. 

